ETS-Lindgren 2090 Controller User Manual

Page 25

Model 2090 Multi-Device Controller

CLOCKWISE direction. Flashes to acknowledge user key-

press of the DOWN/CCW key and to indicate that the

target motion is in the DOWN or COUNTER-

CLOCKWISE direction during reverse delay operations.

POLARIZATION/FLOAT/SPEED key – This key has a

variety of behaviors depending on the attached primary

device type:

a. For towers, pressing this key toggles the tower boom

between horizontal and vertical polarization when the

display shows the current position; and toggles the

display between horizontal and vertical limit displays

when showing an upper or lower limit.

b. For air-flotation turntables, pressing this key floats or

lowers the turntable on its air cushions. The turntable

cannot be dropped while in motion.

c. For two speed turntables, pressing this key toggles the

turntable between fast and slow speed.

d. For standard variable speed turntables, pressing this key

advances the selected speed setting to the next preset

speed selection.

HOR/UP/FAST indicator – This indicator has a variety of

behaviors depending on the attached primary device type:

a. For towers, this indicator lights solid to indicate that the

tower is polarized horizontally. This indicates the

status of the polarization solenoid only, and may or may

not reflect the actual position of the tower’s cross boom

at any given instant. This indicator flashes to indicate

that the display is showing the upper or lower limit for

the horizontal polarization, while the tower is still

polarized vertically.

Revision G– P#399199